<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        a {
            padding: 100px;
        }

        a:hover {
            color: red;
        }

        .box1 {
            width: 500px;
            height: 200px;
        }
    </style>
</head>

<body>
    <div class="box">
        <a href="">nih</a>
        <div class="box1">
            <a href="">你好</a>
        </div>
    </div>

</body>

</html>